/** Get a sub-field, with a key relative to the current field. */
public Field sub(String key) {
String subKey;
if (key.startsWith("[")) {
subKey = name + key;
} else {
subKey = name + "." + key;
}
return form.field(subKey);
}
/** Return the indexes available for this field (for repeated fields ad List) */
public List<Integer> indexes() {
List<Integer> result = new ArrayList<Integer>();
if (form.value().isDefined()) {
BeanWrapper beanWrapper = new BeanWrapperImpl(form.value().get());
beanWrapper.setAutoGrowNestedPaths(true);
String objectKey = name;
if (form.name() != null && name.startsWith(form.name() + ".")) {
objectKey = name.substring(form.name().length() + 1);
}
if (beanWrapper.isReadableProperty(objectKey)) {
Object value = beanWrapper.getPropertyValue(objectKey);
if (value instanceof Collection) {
for (int i = 0; i < ((Collection) value).size(); i++) {
result.add(i);
}
}
}
} else {
java.util.regex.Pattern pattern =
java.util.regex.Pattern.compile(
"^" + java.util.regex.Pattern.quote(name) + "\\[(\\d+)\\].*$");
for (String key : form.data().keySet()) {
java.util.regex.Matcher matcher = pattern.matcher(key);
if (matcher.matches()) {
result.add(Integer.parseInt(matcher.group(1)));
}
}
}
return result;
}